Terminal and mobile terminal apparatus

ABSTRACT

A terminal is formed by plating a terminal substrate in which a first material capable of being plated and a second material incapable of being plated are two-color molded. For example, by two-color molding an ABD resin and a PC resin to form a terminal substrate and plating the terminal substrate, a terminal having a conductive part corresponding to the ABS resin and a nonconductive part corresponding to the PC resin is obtained.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a terminal having a conductive part andnonconductive part, and to a mobile terminal apparatus mounted with theterminal.

2. Description of the Related Art

Conventionally, telephone calls and transmission and reception ofelectronic mails with a cellular phone, and the like are widely used forcommunication with members of a family and friends. By usingcommunication means such as telephone and electronic mail, one caneasily contact any distant members of his or her family and friendswhenever he or she wishes.

Further, in recent years, cellular phones and PDA (Personal DigitalAssistant) are utilized not only as communication means, but also asimage taking apparatuses for taking images of subjects computers forviewing Web sites, alarm clocks used on the road, or the like. Withdiversified applications of the mobile terminal apparatus such as acellular phone and PDA, the number of various electronic parts mountedon the mobile terminal apparatus has increased and it has becomenecessary to provide the mobile terminal apparatus with a watertightfunction. Particularly, a gap between a housing of the apparatus and abattery terminal which is connected to a charger to supply electricityto a battery accommodated in the apparatus is required to be reliablyshielded from water, because the battery terminal is exposed on theouter surface of the housing and is connected to various electronicparts in the apparatus.

Usually, a battery terminal is formed by attaching a conductive platehaving a plus contact and a minus contact formed thereon and is fittedin a housing of the mobile terminal apparatus such that the plus andminus contacts are exposed in the opening of the housing. As a method towaterproof a gap between the battery terminal and opening, there hasbeen used a technique that each of the plus and minus contacts issurrounded with a watertight member and then the watertight member issandwiched between the housing and battery terminal (see, for example,Japanese Patent Laid-Open Nos. 6-26330, 10-144275, and 2001-185280).

However, in order to obtain reliable waterproofness as well as electricconductivity, a plate for a plus contact and that for a minus contactshould be attached on the terminal substrate such that they are spacedapart and are surrounded by a watertight member, which results in anincreased adhesive area and thus an increase in size of the apparatus.On the other hand, if an area to which the watertight member is to beattached is reduced in order to avoid increase in size of the apparatus,waterproofness deteriorates. Alternatively, if an exposed area of theplate is reduced in order to avoid increase in size of the apparatuswithout reducing the area to which the watertight member is attached,electric conductivity deteriorates.

Moreover, when a battery terminal is formed by attaching a plate onto aterminal substrate, it is difficult to make thickness of a plate and anadhesive agent completely uniform. In order to secure waterproofness ofsuch a terminal having a non-uniform thickness, a thick watertightmember should be attached onto a wide adhesive area, which results inincrease in size of the apparatus.

SUMMARY OF THE INVENTION

The present invention has been made in view of the above circumstancesand provides a terminal and a mobile terminal apparatus that can realizeexcellent electric conductivity as well as waterproofness.

A terminal according to the present invention is formed by plating aterminal substrate in which a first material capable of being plated anda second material incapable of being plated are two-color molded.

An ABS resin that is a copolymer compound of acrylonitrile, butadiene,and styrene is known as a resin on which plating can be deposited, whilea PC resin such as polycarbonate is known as a resin on which platingcan not be deposited. For example, by two-color molding a terminalsubstrate and plating the terminal substrate with the ABS resin and PCresin, a terminal having a conductive part corresponding to the ABSresin and a nonconductive part corresponding to the PC resin can beobtained. In the terminal according to the present invention, it is notnecessary that two or more plates are adhered onto a terminal substrateso as to be placed apart unlike the conventional techniques. Thus, theterminal according to the present invention can realize reduction in thenumber of parts. Further, the terminal has a uniform thickness such thata plus contact and a minus contact are securely polarized.

Additionally, in the terminal according to the invention, the firstmaterial may be an ABS resin that is a copolymer compound ofacrylonitrile, butadiene, and styrene, and the second material is apolycarbonate resin.

As the ABS resin and PC resin are widely spread materials, they arefavorably used as materials for this invention.

Further, a mobile terminal apparatus according to the present inventionincludes a terminal that is formed by plating a terminal substrate inwhich a first material capable of being plated and a second materialincapable of being plated are two-color molded.

As the terminal obtained by plating the terminal substrate with thefirst material and the second material has a uniform thickness, themobile terminal apparatus can avoid increase in size and have excellentconductivity.

Preferably, the mobile terminal apparatus according to the presentinvention includes: a housing with an opening section formed therein, inwhich the terminal is fitted into the opening section of the housing;and a watertight member that closes a gap between the housing and theopening section.

As the gap between the housing and the opening section is closed, entryof water into the opening section can be prevented. In addition,according to the mobile terminal apparatus of the present invention, athin terminal having a uniform thickness can be obtained, and thus it ispossible to minimize thickness of the watertight member and an adhesivearea, which results in miniaturization and reliable waterproofness ofthe apparatus.

Further preferably, in the mobile terminal apparatus, the terminal isfitted in the opening section of the housing such that only a part ofthe terminal formed with the second material is exposed in the openingsection.

For excellent conductivity, it is preferable to maximize a conductivepart of the terminal exposed in the opening of the housing.Alternatively, for reliable waterproofness, it is preferable to minimizethe opening section of the housing. For this reason, it is desired thatonly a part of the terminal formed with the conductive second materialbe fitted in the opening section.

Further preferably, in the mobile terminal apparatus, the watertightmember is an O-ring that surrounds the part of the terminal exposed inthe opening.

Surrounding the opening section of the terminal with the O-ring reliablyprevents entry of water into the opening section.

Further preferably, in the mobile terminal apparatus of the presentinvention, the terminal may be a terminal for a battery.

As a battery-purpose terminal is exposed in the housing and connected tovarious electronic parts incorporated in the mobile terminal apparatus,it needs to be reliably watertight. Thus, a battery-purpose terminal ispreferably employed in the present invention.

It is also preferable that the mobile terminal apparatus furtherincludes a vibrator that causes the mobile terminal apparatus tovibrate, wherein the terminal includes a contact for the vibrator.

According to the mobile terminal apparatus of the present invention, itis possible to decrease the number of parts incorporated therein andthus miniaturize the apparatus as well as realize reduction inmanufacturing costs.

Further preferably, in the mobile terminal apparatus of this invention,the first material is an ABS resin that is a copolymer compound ofacrylonitrile, butadiene, and styrene, and the second material is apolycarbonate resin.

By using the ABS resin and PC resin as materials for the terminal, it ispossible to obtain excellent conductivity.

It is also preferable in the mobile terminal apparatus of this inventionto have a pressing section that presses the terminal toward the housing.

The spring section that presses the terminal toward the housing reliablywaterproofs the terminal.

As described above, the present invention can realize the terminal andthe mobile terminal apparatus that has excellent conductivity as well aswaterproofness while minimizing the size of the apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an outside perspective view of a cellular phone to which oneembodiment of the present invention is applied;

FIG. 2 is a view showing a back surface of an upper housing;

FIG. 3 is a view showing a back surface of a lower housing;

FIG. 4 is an inside block diagram of the cellular phone;

FIG. 5 is an exploded perspective view of a hinge section of thecellular phone;

FIG. 6 is an enlarged view near the hinge section;

FIG. 7 is an outside view of the cellular phone of the present inventionand a conventional cellular phone;

FIG. 8 is an exploded perspective view of the upper housing;

FIG. 9 is a view showing a surface of the panel facing the case and alight shielding plate affixed on the surface;

FIG. 10 is an exploded perspective view of the lower housing of thecellular phone when a lid and a cover covering a rechargeable battery180 are removed;

FIG. 11 is a view showing states in which the lid is opened and closed;

FIG. 12 is an enlarged view of the cover and the lower housing near alock mechanism;

FIG. 13 is a view showing a housing facing surface of the cover facingthe lower housing;

FIG. 14 is a cross sectional view cut in the width direction of thecellular phone with the rechargeable battery attached therein;

FIG. 15 is an exploded perspective view of the lower housing;

FIG. 16 is a view showing the charging terminal in process ofmanufacturing;

FIG. 17 is a view showing the charging terminal after being subjected toplating process;

FIG. 18 is a cross sectional view cut in the width direction of thelower housing with the charging terminal attached thereto; and

FIG. 19 is a view showing the back surface of the lower housing.

DETAILED DESCRIPTION OF THE INVENTION

Now, an embodiment of the present invention will be described withreference to the drawings.

FIG. 1 is an outside perspective view of a cellular phone to which oneembodiment of the present invention is applied.

A cellular phone 100 shown in FIG. 1 includes mainly a datacommunication function for transmitting/receiving voice and electronicmails and the like to/from external apparatuses and an image takingfunction for taking images of subjects. The whole cellular phone 100 haswatertight function.

The cellular phone 100 is configured by coupling an upper housing 100Athat a user puts to his/her ear during a telephone call and a lowerhousing 100B that the user holds in his/her hand, in such a manner thatthey can be folded around a hinge section 100C. In this description, inthe upper housing 100A and the lower housing 100B, surfaces which hidewhen the cellular phone 100 is folded are referred to as front surfacesand surfaces which are opposite to the front surfaces and expose whenthe cellular phone 100 is folded are referred to as back surfaces. Theupper housing 100A and the lower housing 100B correspond to examples ofa housing referred in the present invention.

The upper housing 100A includes, on its front surface, a liquid crystalpanel 101 on which a menu screen and taken images and the like aredisplayed and an earpiece 102 for transmitting voice emitted from aspeaker provided therein. The lower housing 100B includes, on its frontsurface, a select button 104 used for selection of various functions orused as a shutter button when taking images, push buttons 105 forinputting telephone numbers and the like, and a mouthpiece 106 fortransmitting voice to a microphone provided therein.

FIG. 2 is a view showing the back surface of the upper housing 100A.

On the back surface of the upper housing 100A, a backlight (describedlater) and a back surface liquid crystal panel (described later) areincorporated. Light from the backlight and the back surface liquidcrystal panel transmits through the upper housing 100A to display aclock and patterns.

FIG. 3 is a view showing the back surface of the lower housing 100B.

On the back surface of the lower housing 100B, a charging terminal 108is provided which is connected to an external charger when charging.Near the hinge section 100C, there are incorporated a short-rangeantenna 109 a for transmitting and receiving images and addressinformation and the like via wireless communication for short range, andan image taking lens 109 b for imaging subject lights. Further, on theback surface of the lower housing 100B, a long-range antenna 107 (seeFIG. 5) is also incorporated for transmitting and receiving data such asvoice and electronic mails via a base station, although not shown inFIG. 3.

When transmitting voice and electronic mails and the like with thecellular phone 100, the user inputs telephone numbers and electronicmail addresses and the like with the push buttons 105 so that data isdirected to specified communication destinations via wirelesscommunication for long range. The data originated from the cellularphone 100 is once received at the base station and then transmitted fromthe base station to the communication destinations via telephone lines,LAN lines, other base stations, etc. Conversely, data transmitted fromthe other party is received at the base station, converted into radiodata and then transmitted to the cellular phone 100.

When taking images of subjects with the cellular phone 100, the userpushes the select button 104 while aiming the image taking lens 109 b ata subject, so that an image is taken by a camera device (see FIG. 4)incorporated in the cellular phone 100.

Next, an inner structure of the cellular phone 100 will be described.

FIG. 4 is an inside block diagram of the cellular phone 100.

In FIG. 4, a CPU 110, a ROM 111, a nonvolatile memory 112, a RAM 113, amicrophone device 121, a speaker device 122, a front surface displaydevice 131, a clock 132, a back surface display device 133, a cameradevice 140, a short-range wireless device 141, a long-rangecommunication device 142, a backlight 151, a key device 161, anopen/close switch 162, and a media controller 170 are shown and they areinterconnected via buses. A recording media 171 and a rechargeablebattery 180 are also connected to the cellular phone 100.

The CPU 110 has a function of executing various programs and controlsthe whole cellular phone 100.

In the ROM 111, various programs which are executed by the CPU 110 andvarious constants which are required to execute the various programs arestored. The CPU 110 executes the programs stored in the ROM 111, usingthe RAM 113 as a work area.

In the nonvolatile memory 112, various information such as an addressbook and received electronic mails is recorded, which may be rewritten.

The microphone device 121 is a microphone for picking up voice of theuser and a function block of processing the voice picked up by themicrophone.

The speaker device 122 is a speaker for outputting voice toward the userand a function block of generating voice signals for driving thespeaker.

The short-range wireless device 141 is intended to transmit images andtelephone numbers and the like to external apparatuses which are locatedat short distance without involving base stations, by using theshort-range antenna 109 a shown in FIG. 3. In this embodiment, infraredcommunication is employed.

The camera device 140 is a block of collecting image data obtained byphoto-taking, the front surface display device 131 is a block ofdisplaying images to the liquid crystal panel 101 provided on the frontsurface of the upper housing 100A shown in FIG. 1, the clock 132 is ablock for obtaining the current time, the back surface display device133 is a block of displaying images to the back surface liquid crystalpanel (described later) incorporated in the back surface of the upperhousing 100A shown in FIG. 2, the backlight 151 is intended to emitlight toward the back surface of the upper housing 100A, and the keydevice 161 is a block of detecting key operations of the select button104 and the push buttons 105 (see FIG. 1) by the user.

The open/close switch 162 is a switch which turns on when the upperhousing 100A and the lower housing 100B of the cellular phone 100 areopened and turns off when they are closed. When the upper housing 100Aand the lower housing 100B of the cellular phone 100 are opened and theopen/close switch 162 turns on, the CPU 110 causes the clock and thelike to be displayed on the liquid crystal panel 101 provided on thefront surface of the upper housing 100A. On the other hand, when theupper housing 100A and the lower housing 100B of the cellular phone 100are closed and the open/close switch 162 turns off, the CPU 110 causesthe backlight 151 provided on the back surface of the upper housing 100Ato emit light and causes the clock to be displayed on the back surfaceliquid crystal panel. The backlight 151 and the back surface liquidcrystal panel will be described later in detail.

The media controller 170 is intended to read out data from the recordingmedia 171 and write image data generated by the camera device 140 andthe like into the recording media 171.

Further, the long-range communication device 142 serves to transmit andreceive telephone calls and electronic mails and the like via thelong-range antenna 107 (see FIG. 5). The data transmitted from thelong-range communication device 142 is sent via the base station toother telephones and personal computers.

The cellular phone 100 is configured as described above, basically.

Hereinafter, a configuration near the hinge section 100C of the cellularphone 100 shown in FIG. 1, a configuration on the back surface of theupper housing 100A shown in FIG. 2, a configuration near therechargeable battery 180 shown in FIG. 4, and a configuration near thecharging terminal 108 shown in FIG. 3 will be described in detail,sequentially.

First, the configuration near the hinge section 100C of the cellularphone 100 will be described.

FIG. 5 is an exploded perspective view of the hinge section 100C of thecellular phone 100.

The hinge section 100C of the cellular phone 100 also shown in FIG. 1 iscomposed of a hinge 210 which couples the upper housing 100A and thelower housing 100B in a rotatable manner and a hinge cover 220 which isattached to the hinge 210 to hide the hinge 210. The hinge 210corresponds to an example of a hinge referred in this invention and thehinge cover 220 corresponds to an example of a hinge cover referred inthis invention.

On the back surface of the lower housing 100B, the short-range antenna109 a and the image taking lens 109 b also shown in FIG. 3 areincorporated. In addition, screws 190 for tightening the lower housing100B and the long-range antenna 107 surrounding the short-range antenna109 a and the image taking lens 109 b and the like are mounted. Thelong-range antenna 107 corresponds to an example of an antenna referredin this invention and the screws 190 correspond to examples of atightening member referred in this invention.

In the coupling surface of the upper housing 100A and the lower housing100B, there are formed a groove 100E in which the hinge 210 is fitted, ahinge cover section 100D which covers the hinge 210 and holds the hingein a rotatable manner, and a claw fixing section 1001 in which a claw(described later) provided on the hinge cover 220 is fitted. The groove100E corresponds to an example of a groove referred in this invention.

The hinge cover 220 is composed of end cover sections 221 which coverends of the hinge 210, an outer circumference cover section 222 whichhides the outer circumferential surface of the hinge 210, and a housingcover section 223 which covers a part of the lower housing 100B. On theouter circumference cover section 222, the claw (not shown) which isfitted in the claw fixing section 1001 is provided. The outercircumference cover section 222 corresponds to an example of an outercircumference cover section referred in this invention and the end coversections 221 correspond to examples of both-end cover sections referredin this invention.

FIG. 6 is an enlarged view near the hinge section 100C.

When the hinge 210 is attached in the groove 100E in FIG. 5, the hingecover section 100D provided on the upper housing 100A and the lowerhousing 100B cover the hinge 210, and the upper housing 100A and thelower housing 100B are coupled in a rotatable manner around the hinge210.

Then, a double-sided tape is adhered on the housing cover section 223 ofthe hinge cover 220, and the end cover sections 221 of the hinge cover220 are fitted into gaps P between the respective ends of the hinge 210,and the upper housing 100A and the lower housing 100B. Consequently, thehousing cover section 223 of the hinge cover 220 is adhered on the lowerhousing 100B with the double-sided tape and the claw provided on thehinge cover 220 is fitted into the claw fixing section 1001, so that thehinge cover 220 is attached to the hinge 210, the upper housing 100A,and the lower housing 100B.

In the cellular phone 100 with the hinge cover 220 attached thereto, thehinge cover section 100D and the outer circumference cover section 222of the hinge cover 220 cover the outer circumferential surface of thehinge 210, the end cover sections 221 of the hinge cover 220 cover bothends of the hinge 210, and the housing cover section 223 of the hingecover 220 covers the screws 190 and the long-range antenna 107 providedon the lower housing 100B.

In this way, according to the cellular phone 100 of this embodiment, itis not necessary to attach hinge caps separately on each end of thehinge, and the hinge can be reliably hidden only with the hinge cover220. Further, by covering the long-range antenna 107 and the screws 190with the hinge cover 220, dirt and damage of the long-range antenna 107can be prevented without increasing the number of parts. In addition,the appearance of the cellular phone 100 can be improved.

FIG. 7 is an outside view of the cellular phone 100 of this embodimentand a conventional cellular phone 100′.

In the conventional cellular phone 100′, a hinge cap is separatelyattached on each end of the hinge, in addition to the hinge cover whichcovers the outer circumferential surface of the hinge. Therefore, thenumber of parts increases. In addition, in order to attach the separatehinge caps to both ends of the hinge, it is necessary to extend thehinge section 100C′ to both ends of the upper housing 100A′ and thelower housing 100B′ as shown in part (B) of FIG. 7, which results inproblems of limiting design of the cellular phone 100′ and inhibitingslim design of the cellular phone 100′.

As shown in part (A) of FIG. 7, in the cellular phone 100 of thisembodiment, the hinge 210 can be reliably hidden and the length W1 ofthe hinge section 100C can be shorter than the length W2 of the upperhousing 100A and the lower housing 100B in their width direction.Therefore, design of the cellular phone 100 can be improved and thecellular phone 100 can be slim.

Here, note that the cellular phone 100 has a watertight function withoutthe hinge cover 220. In the manufacturing process of the cellular phone100, a watertight test has been carried out before attachment of thehinge cover 220. The hinge cover 220 is attached to the cellular phone100 which has passed the watertight test, in order to finish the finalproduct. The cellular phone 100 which has failed the watertight test isdelivered to a readjusting process and readjusted there, and then thehinge cover 220 is attached to the cellular phone after having passed aretest. Thus, because the cellular phone 100 has watertight functionwithout the hinge cover 220, the watertight test can be carried outwithout attaching the hinge cover 220, so that tasks of repeatedlyattaching and removing the hinge cover 220 in the readjusting processcan be omitted.

So far, the configuration near the hinge section 100C of the cellularphone 100 has been described. Then, the configuration on the backsurface of the upper housing 100A will be described.

FIG. 8 is an exploded perspective view of the upper housing 100A.

The upper housing 100A is composed of a case 310 in which various partsare accommodated and a panel 320 covering the case 310. The case 310 hasa hole 311 in which the backlight 151 and the back surface liquidcrystal panel 152 also shown in FIG. 4 are placed. Further, the panel320 is a colored thin plate made of acryl and is translucent. The case310 corresponds to an example of a box section referred in thisinvention, the panel 320 corresponds to an example of a panel referredin this invention, and the backlight 151 corresponds to an example of alight source referred in this invention.

In addition, on the surface of the panel 320 facing the case 310, alight shielding plate 330 (see FIG. 9) for shielding light is affixed.

FIG. 9 is a view showing the surface of the panel 320 facing the case310 and the light shielding plate 330 affixed on the surface.

As shown in FIG. 9, on this surface of the panel 320, a light diffusiontransmission layer 321 is formed by applying white paint. The lightdiffusion transmission layer 321 corresponds to an example of a lightdiffusion transmission layer referred in this invention.

Further, through holes 331, 332 are provided in the light shieldingplate 330 at portions corresponding to the backlight 151 and the backsurface liquid crystal panel 152 shown in FIG. 8. A circumferential edge331′ of the through hole 331 corresponding to the backlight 151 istapered toward the panel 320. The light shielding plate 330 correspondsto an example of a light shielding plate referred in this invention.

Light emitted from the backlight 151 passes through the through hole 331of the light shielding plate 330 and is diffused in the light diffusiontransmission layer 321 of the panel 320, so that the softened lightemits from the panel 320. Additionally, because the light emitted fromthe backlight 151 is diffusedly reflected at the tapered circumferentialedge 331′, faint gentle light can be displayed on the panel 320.

Further, because portions other than the portions corresponding to thebacklight 151 and the back surface liquid crystal panel 152 are coveredby the light shielding plate 330, it can be avoided that various partsaccommodated in the case 310 can be disadvantageously seen through thepanel 320.

Moreover, because the light diffusion transmission layer 321 of thepanel 320 is applied with white paint, the diffusivity of light isincreased and the effect of hiding various parts in the case 310 is alsoimproved.

Thus, according to the cellular phone 100 in this embodiment, it is notnecessary to provide a frosted glass for diffusing light and thereforeincrease in size and cost of the apparatus can be inhibited. Inaddition, it can be avoided that the parts in the housing can bedisadvantageously seen through. Further, gentle light can be displayed.

So far, the configuration on the back surface of the upper housing 100Ahas been described. Then, the configuration near the rechargeablebattery 180 shown in FIG. 4 will be described.

In this embodiment, the rechargeable battery 180 is removablyaccommodated in the lower housing 100B and is shielded from water bycovering with the lid and the cover.

FIG. 10 is an exploded perspective view of the lower housing 100B of thecellular phone 100 when a lid 420 and a cover 430 covering therechargeable battery 180 are removed.

In the lower housing 100B, an opening section 411, a shaft receivingsection 410, and a guide 412 are formed and the rechargeable battery 180is fitted into the opening section 411. The rechargeable battery 180 isconnected to the charging terminal 108 also shown in FIG. 3 andconnected to various elements constituting the cellular phone 100 shownin FIG. 4. The shaft receiving section 410 is composed of a shaftfitting section in which a shaft is fitted and a stopper by which thelid 420 is supported. The guide 412 is a groove which is withdrawninward by an amount of thickness of the cover 430, so that the cover 430is slid along the guide 412. The shaft receiving section 410 correspondsto an example of a shaft receiving section referred in this invention,the guide 412 corresponds to an example of a guide referred in thisinvention, and the rechargeable battery 180 corresponds to an example ofan accommodated object referred in this invention.

The lid 420 is equipped with a shaft 421 which is rotatably attached tothe shaft receiving section 410 of the lower housing 100B. The shaft 421is removably attached to the shaft receiving section 410 such that thelid 420 laterally opens and closes the opening section 411 of the lowerhousing 100B. The shaft 421 corresponds to an example of a shaftreferred in this invention and the lid 420 corresponds to an example ofa lid referred in this invention.

The cover 430 has a claw 430 a on its top and is attached to the lowerhousing 100B in a perpendicular direction by fitting the claw 430 a intoa claw fixing section (not shown) provided in the lower housing 100B.Additionally, the cover 430 has a through hole 431 in which the chargingterminal 108 is fitted and a lock mechanism 432 which is locked to thelower housing 100B. The lock mechanism 432 corresponds to an example ofa lock mechanism referred in this invention and the cover 430corresponds to an example of a cover referred in the present invention.

The cover 430 has the claw 430 a and is slid along the guide 412 of thelower housing 100B and attached to the lower housing 100B by fitting theclaw 430 a into the claw fixing section (not shown) provided in thelower housing 100B. Additionally, the cover 430 has the through hole 431in which the charging terminal 108 is fitted and the lock mechanism 432which is locked to the lower housing 100B. The lock mechanism 432corresponds to an example of a lock mechanism referred in this inventionand the cover 430 corresponds to an example of a cover referred in thepresent invention.

First, the lid 420 will be described in detail.

FIG. 11 is a view showing states in which the lid 420 is opened andclosed.

In part (A) of FIG. 11, the state in which the lid 420 is closed isshown. The cover facing surface 420A of the lid 420 facing the cover 430is formed of a metal plate which is non-permeable to water. The lid 420has a claw (not shown) and is fixed to the lower housing 100B by fittingthe claw into the claw fixing section (not shown) provided in the lowerhousing 100B, when the lid 420 is closed and pushed toward the lowerhousing 100B.

On the other hand, in part (B) of FIG. 11, the state in which the lid420 is opened is shown. A rechargeable battery facing section 420B ofthe lid 420 facing the rechargeable battery 180 is formed of an elasticmaterial. Further, a convex section 423 made of an elastic material isformed which surrounds the opening section 411 of the lower housing100B. Moreover, on the rechargeable battery facing section 420B, severalauxiliary convex sections 423 a made of an elastic material areprovided.

Then, the cover 430 will be described in detail.

FIG. 12 is an enlarged view of the cover 430 and the lower housing 100Bnear the lock mechanism 432 and FIG. 13 is a view showing a housingfacing surface of the cover 430 facing the lower housing 100B.

As shown in FIG. 12, an L-shaped groove 424 is formed in the lowerhousing 100B at a position facing the lock mechanism 432.

Further, as shown in FIG. 13, on the housing facing surface of the cover430, a lock lever 432 a is provided which is fitted into the groove 424of the lower housing 100B and several convex sections 433 are formed atportions facing the lid 420. The cover 430 is attached to the lowerhousing 100B in the perpendicular direction and the lock lever 432 awhich constitutes the lock mechanism 432 is slid along the groove 424 ofthe lower housing 100B, so that the cover 430 is reliably locked to thelower housing 100B.

When attaching the rechargeable battery 180 to the cellular phone 100,the user accommodates the rechargeable battery 180 in the openingsection 411 of the lower housing 100B shown in FIG. 10, closes the lid420 to fix the claw of the lid 420 shown in FIG. 11 to the lower housing100B and then slides the cover 430 shown in FIG. 10 along the guide 412of the lower housing 100B. As a result, the claw 430 a of the cover 430is fitted into the claw fixing section provided in the lower housing100B. Then, the cover 430 is fitted into the lower housing 100B and thelock mechanism 432 is locked.

FIG. 14 is a cross sectional view cut in the width direction of thecellular phone 100.

As shown in FIG. 14, the convex section 433 of the cover 430 presses thelid 420 so that the convex section 423 of the lid 420 and the auxiliaryconvex sections 423 a shown in FIG. 11 are pressed onto the lowerhousing 100B. Because the convex section 423 of the lid 420 is formed ofan elastic material and surrounds the opening section 411 of the lowerhousing 100B in which the rechargeable battery 180 is accommodated, theopening section 411 is closed by the lid 420 without any gap.

In this way, according to the cellular phone 100 of this embodiment,when the user simply closes the lid 420 and attaches the cover 430, thecover 430 presses the lid 420 so that the lid 420 reliably closes theopening section 411. Therefore, the rechargeable battery 180 can beeasily shielded from water, even by users who are weak such as childrenand elderly persons. Further, because the lid 420 is opened and closedby being rotated around the shaft extending in the same direction as thesliding direction of the cover 430, it can be avoided that the lid 420is accidentally opened when the cover 430 is attached or removed, whichcan lead to damage of the lid 420.

So far, the configuration near the rechargeable battery 180 has beendescribed. Then, the configuration near the charging terminal 108 shownin FIG. 3 will be described.

FIG. 15 is an exploded perspective view of the lower housing 100B.

The lower housing 100B includes a body substrate 510 provided withvarious electronic parts for achieving the telephone call function andthe like, the charging terminal 108 which is connected to the bodysubstrate 510 and is partially exposed on the back surface of the lowerhousing 100B, and a fixing case 530 which is mounted to the bodysubstrate 510 with the charging terminal 108 between the fixing case andthe body substrate 510. Although the rechargeable battery 180, the lid420, the cover 430 and the like shown in FIG. 10 are also attached inthe lower housing 100B, they are not shown here for simplicity of thedescription.

In the body substrate 510, a metal spring 511 is provided for urging thecharging terminal 108 toward the fixing case 530. In the fixing case530, an opening section is formed in which a part of the chargingterminal 108 is fitted.

The charging terminal 108 includes, on a substrate made of plastic, anonconductive section 524 which is nonconductive and a battery contact521, a vibrator contact 522, and a connecting section 523 connected tothe battery contact 521 and the vibrator contact 522. An O-ring 600 isattached to the battery contact 521, surrounding the battery contact521. The O-ring 600 corresponds to an example of an O-ring referred inthis invention and also corresponds to an example of a watertight memberreferred in this invention.

FIG. 16 is a view showing the charging terminal 108 in process ofmanufacturing.

Part (A) of FIG. 16 is a top view of the charging terminal 108 inprocess of manufacturing and part (B) of FIG. 16 is a side view of thecharging terminal 108 in process of manufacturing.

In manufacturing the charging terminal 108 shown in FIG. 15, at first, aPC resin (polycarbonate) on which plating is not deposited and an ABSresin (copolymer compound of acrylonitrile, butadiene, and styrene) onwhich plating is deposited are two-color molded to form the terminalsubstrate 108′. The ABS resin corresponds to an example of a “firstmaterial on which plating is deposited” referred in this invention andthe PC resin corresponds to an example of a “second material on whichplating is not deposited” referred in this invention.

As shown in FIG. 16, in the terminal substrate 108′, the nonconductivepart 524′ corresponding to the nonconductive part 524 shown in FIG. 15is formed of the PC resin and conductive parts 521′, 522′, 523′corresponding to the battery contact 521, the vibrator contact 522, andthe connecting part 523 are formed of the ABS resin.

Subsequently, the terminal substrate 108′ is subjected to platingprocess. As a result, plating is not deposited on the nonconductive part524′ formed of the PC resin and is deposited only on the conductiveparts 521′, 522′, 523′ formed of the ABS resin, so as to form thecharging terminal 108.

In this way, by two-color molding the resin on which plating isdeposited and the resin on which plating is not deposited in order toform the terminal substrate and then performing the plating process forthe terminal substrate so as to form the terminal, the terminal havingsuperior conductivity and uniform thickness can be formed.

FIG. 17 is a view showing the charging terminal 108 after beingsubjected to the plating process.

Part (A) of FIG. 17 shows the charging terminal 108 just after beingsubjected to the plating process and part (B) of FIG. 17 shows thecharging terminal 108 after the O-ring 600 is attached.

As shown in FIG. 17, plating is deposited on the conductive parts 521′,522′, 523′ formed of the ABS resin in the terminal substrate 108′ toform the battery contact 521, the vibrator contact 522, and theconnecting part 523. Plating is not deposited on the nonconductive part524′ formed of the PC resin in the terminal substrate 108′.

The battery contact 521 projects and the O-ring 600 is attached so as tosurround the projecting battery contact 521.

FIG. 18 is a cross sectional view cut in the width direction of thelower housing 100B with the charging terminal 108 attached thereto.

As shown in FIG. 18, the battery contact 521 of the charging terminal108 is fitted in the opening section 531 of the fixing case 530 and isexposed in the lower housing 100B of the cellular phone 100. However,because a gap between the opening section 531 and the battery contact521 is closed by the O-ring 600, entry of water into the lower housing100B is reliably prevented.

In addition, the vibrator contact 522 of the charging terminal 108 isconnected to a vibrator 700 which vibrates the cellular phone 100 whentelephone calls or electronic mails are received, for example. Byproviding the charging terminal 108 with the contact for charging andthe contact for the vibrator 700, the number of parts can be reduced andmanufacturing cost and size of the apparatus can be minimized.

FIG. 19 is a view showing the back surface of the lower housing 100B.

According to the cellular phone 100 of this embodiment, a terminalhaving superior conductivity and uniform thickness can be formed andtherefore the thickness and the adhesion surface of the watertightmember (the O-ring 600) can be minimized so that size reduction of theapparatus and reliable watertight property can be simultaneouslyachieved. In addition, a plus contact and a minus contact can bereliably polarized without processing a metal plate or the like andfurther the adhesion surface of the O-ring 600 can be reduced.Therefore, the area of the charging terminal 108 connected to thecharger can be increased to improve the charging efficiency.

Although the example of applying the mobile terminal apparatus of thepresent invention to the cellular phone has been described in the abovedescription, the mobile terminal apparatus of the present invention maybe applied to a PDA and the like.

Further, although the example of providing a light diffusiontransmission layer formed of white paint applied on the panel has beendescribed in the above description, the mobile terminal apparatus of thepresent invention can be provided with a light diffusion transmissionlayer formed by applying paint other than white paint. While lightdiffusion efficiency can be improved by using the light diffusiontransmission layer formed of white paint, light diffusion effect can bealso obtained with gray paint and the like.

Further, although the example of shielding the rechargeable batteryaccommodated in the housing from water by using the lid and the coverhas been described in the above description, the mobile terminalapparatus of the present invention may be adapted to shield a recordingmedia accommodated in the housing from water by using the lid and thecover.

Further, although the example of forming the charging terminal bytwo-color molding the ABS resin and the PC resin has been described inthe above description, the terminal in the present invention may beformed by using a combination of a resin on which gold plating isdeposited and a resin on which gold plating is not deposited, other thanthe ABS resin and the PC resin.

1. A terminal formed by plating a terminal substrate in which a firstmaterial capable of being plated and a second material incapable ofbeing plated are two-color molded.
 2. The terminal according to claim 1,wherein the first material is an ABS resin that is a copolymer compoundof acrylonitrile, butadiene, and styrene, and the second material is apolycarbonate resin.
 3. A mobile terminal apparatus comprising: aterminal that is formed by plating a terminal substrate in which a firstmaterial capable of being plated and a second material incapable ofbeing plated are two-color molded.
 4. The mobile terminal apparatusaccording to claim 3 further comprising: a housing with an openingsection formed therein, in which the terminal is fitted into the openingsection of the housing; and a watertight member that closes a gapbetween the housing and the opening section.
 5. The mobile terminalapparatus according to claim 4, wherein the terminal is fitted in theopening section of the housing such that only a part of the terminalformed with the second material is exposed in the opening section. 6.The mobile terminal apparatus according to claim 5, wherein thewatertight member is an O-ring that surrounds the part of the terminalexposed in the opening.
 7. The mobile terminal apparatus according toclaim 3, wherein the terminal is a terminal for a battery.
 8. The mobileterminal apparatus according to claim 7, further comprising a vibratorthat causes the mobile terminal apparatus to vibrate, wherein theterminal includes a contact for the vibrator.
 9. The mobile terminalapparatus according to claim 3, wherein the first material is an ABSresin that is a copolymer compound of acrylonitrile, butadiene, andstyrene, and the second material is a polycarbonate resin.
 10. Themobile terminal apparatus according to claim 3, further comprising apressing section that presses the terminal toward the housing.